Published Feb 19, 2018 at 4:36 AM

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In this Oct. 28, 2011, file photo, the Russian Orthodox Cathedral of Christ the Saviour is seen in Kaliningrad, Russia. Note that this was not the church in the deadly shooting committed by ISIS.

The Islamic State group has claimed responsibility for a deadly attack on churchgoers in Russia's predominantly Muslim Dagestan region.

At least five people were killed and four wounded when a gunman opened fire with a hunting rifle on people leaving a Sunday service at a Russian Orthodox church in the Dagestan city of Kizlyar.

Authorities say the gunman was a local resident, and his wife has been detained for questioning. But police haven't commented on the possible motive for the attack.

A statement from the Islamic State group, posted Monday on an IS-affiliated militant website, claimed responsibility for the shooting, saying a Muslim fighter attacked "a Christian temple" in Kizlyar. The authenticity of the statement couldn't be confirmed, but the website is regularly used by IS for posting militant statements.